I agree @PeonyPatch
The public world, and the world of work, are organised around male bodies and the male life-cycle.
In order to get access to work and then equal pay, women had to pretend their bodies were the same as men's. Even then, we still have a sex-pay gap of around 15% I think.
I can remember the time when a serious reason for not employing women as engineers or mechanics (or other occupations seen as mostly male ) was that there were no "facilities" for women. And more generally, feminists have been fighting for safe women's spaces such as public lavatories since the middle of the 19th century (look up the history of the "urinary leash").
We need to argue for a workplace & a public world where women are not treated as just defective men. But the problem is, menstrual leave woykd backfire on women, as the idea that women's bodies are the same as men's has been so deep-rooted in employment etc.
Personally, I think where we might make more useful & productive change is to stop assuming that pain during menstruation is "normal" and women just have to suck it up.
I had extremely painful periods (cold sweats, shivering, nausea, diarrhoea) throughout my thirties, and had to have hormone injections on occasion. There should have been an investigation about why I was in such pain, but it was always dismissed as just the "facts of life." Hormonal contraception really helped, but not all women want this.